累死我了，终于出来了 http://docs.info.apple.com/article.html?artnum=106752
TITLE
Macintosh: How to Eject a Disc When Other Options Do Not Work
Article ID:
Created:
Modified: 106752
2/19/02
11/14/03
TOPIC
You may use Open Firmware to eject a CD or DVD disc when normal methods
for ejecting it have not succeeded.
DISCUSSION
To eject a disc with Open Firmware commands, follow these steps:
1. Restart the computer.
2. Immediately after the startup sound, press and hold
